wow you know it's a 42RE
shocking here, to see that.
42RE has TCM, the only question is how to scan it and find it.
during the late 90s it was moved inside the ECU and became a PCM.
no need to post 23 years of normal service parts.
focus on 42RE, only it. please,
my guess is , not scanning the TCM blinds you to whats UP.>
read the real SM yet> on topic, chapter 21?
click ZJ and read.
ever seen topic , transmission in limphome mode (jeep limp-in)
this mode skips gears. (due to inputs to TCM wrong or other causes)
this box has an electronic governor.
it also does 4>3 downs shifts and TCC lockup on overheats.260f
lots of things it CAN do.
below 50F the TCC is disabled, to warm it up faster.
what does the OD lamp do.?
the lamp tells you when OD 4th gear is disabled, now in 3rd.
there are 2 speed sensor , one is a backup to main.
chapter 21 all this is clearly stated.
The PCM runs the trans, totally no separate TCM
says you need a DRB tool to scan this TCM section...
(my guess why you have no scans, and work blind,)
says there is a kickdown valve, so is the cable jammed full on
stuck in passing gear endlessly?
do not overfill the box. read how.
as some do , in a panic to get it to work , based on more is better.
its not. it foams up and DOOM sets in.fast.
wish we had more symptoms.?
goes to 3rd gear after a short distance
does that mean is starts in 3rd gear stopped?
in DRIVE or LOW? and does REverse work, at all times?
1 range and 2 range ? work? at all times? (lever names)
chapter 21, page 12 table. see that?
elaborate all Tranny issues, hot /cold engine, and all modes of travel and direction, good and bad, (both matter @!!!!) called a shop test drive and gathering all evidence , and the 0D lamps actions.
here is the step your shop skipped. step 1.
what if the PCM (tcm brain) says
sensor, bad, TCM, VSS, or other errors, most do,
it is the not looking first, that is the problem.
why replace a tranny for one bad wire, ???? that was clearly reported to you, if you only looked, (scans)
I hope scans , are a REVELATION.